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You mean a laptop? Considering most PCs don't have batterys
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AthomSfereApr 23 '13 at 17:21

1 Answer
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In Windows, the registry sees this as a dirty shutdown and does a check disk on reboot. It is possible files that are critical are in the middle of a write (Reg keys included) and cause boot / performance issues in the long or short term. Although thats more of an OS question than a PC problem.